//
//
// Copyright 2015 gRPC authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
//

#include "src/core/lib/transport/status_conversion.h"

#include <grpc/support/port_platform.h>

grpc_http2_error_code grpc_status_to_http2_error(grpc_status_code status) {
  switch (status) {
    case GRPC_STATUS_OK:
      return GRPC_HTTP2_NO_ERROR;
    case GRPC_STATUS_CANCELLED:
      return GRPC_HTTP2_CANCEL;
    case GRPC_STATUS_DEADLINE_EXCEEDED:
      return GRPC_HTTP2_CANCEL;
    case GRPC_STATUS_RESOURCE_EXHAUSTED:
      return GRPC_HTTP2_ENHANCE_YOUR_CALM;
    case GRPC_STATUS_PERMISSION_DENIED:
      return GRPC_HTTP2_INADEQUATE_SECURITY;
    case GRPC_STATUS_UNAVAILABLE:
      return GRPC_HTTP2_REFUSED_STREAM;
    default:
      return GRPC_HTTP2_INTERNAL_ERROR;
  }
}

grpc_status_code grpc_http2_error_to_grpc_status(
    grpc_http2_error_code error, grpc_core::Timestamp deadline) {
  switch (error) {
    case GRPC_HTTP2_NO_ERROR:
      // should never be received
      return GRPC_STATUS_INTERNAL;
    case GRPC_HTTP2_CANCEL:
      // http2 cancel translates to STATUS_CANCELLED iff deadline hasn't been
      // exceeded
      return grpc_core::Timestamp::Now() > deadline
                 ? GRPC_STATUS_DEADLINE_EXCEEDED
                 : GRPC_STATUS_CANCELLED;
    case GRPC_HTTP2_ENHANCE_YOUR_CALM:
      return GRPC_STATUS_RESOURCE_EXHAUSTED;
    case GRPC_HTTP2_INADEQUATE_SECURITY:
      return GRPC_STATUS_PERMISSION_DENIED;
    case GRPC_HTTP2_REFUSED_STREAM:
      return GRPC_STATUS_UNAVAILABLE;
    default:
      return GRPC_STATUS_INTERNAL;
  }
}

grpc_status_code grpc_http2_status_to_grpc_status(int status) {
  switch (status) {
    // these HTTP2 status codes are called out explicitly in status.proto
    case 200:
      return GRPC_STATUS_OK;
    case 400:
      return GRPC_STATUS_INTERNAL;
    case 401:
      return GRPC_STATUS_UNAUTHENTICATED;
    case 403:
      return GRPC_STATUS_PERMISSION_DENIED;
    case 404:
      return GRPC_STATUS_UNIMPLEMENTED;
    case 429:
      return GRPC_STATUS_UNAVAILABLE;
    case 502:
      return GRPC_STATUS_UNAVAILABLE;
    case 503:
      return GRPC_STATUS_UNAVAILABLE;
    case 504:
      return GRPC_STATUS_UNAVAILABLE;
    // everything else is unknown
    default:
      return GRPC_STATUS_UNKNOWN;
  }
}

int grpc_status_to_http2_status(grpc_status_code /*status*/) { return 200; }
